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Mineral Talks Live (3 Aug Roy Starkey )

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Alex Speer
Fri, Jul 29, 2022 5:16 PM

[cid:image001.jpg@01D8A34A.F7ED48A0] August 3 Webinar

Every first Wednesday of every month is Mineral Talks LIVE - the monthly LIVE interview series where we sit down the most fascinating people in the mineral world from all over the world and talk rocks.  Collectors, Curators, Curatrixes, Artists, Researchers, Publishers, Dealers and more.  We get into their origin stories and get updated on some of the things they're working on now.  It's always fun, often educational and one of the best ways to learn more about the people who make the mineral world what it is.

You are invited to the next Mineral Talks Live webinar:

3 August 2022 1:00 PM Eastern Time (US and Canada)

Register in advance for this webinar: http://go.mineraltalkslive.com/register

After registering, you will receive a confirmation email containing information about joining the webinar.

Webinar Speaker: Roy Starkey

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Roy Starkey became interested in minerals at an early age but growing up in the South of England (Cretaceous chalk) provided few opportunities to go field collecting. Later he was able to direct family holidays to areas of potential mineral interest – North Wales, the Lake District and Scotland. His brother and parents would all join in the hunt and pile up likely specimens for Roy to vet. At secondary school he was fascinated by anything to do with science (especially chemistry) and was an avid follower of the Apollo space missions. He went on to study geology at the University of Sheffield and subsequently followed a career in manufacturing industry in various operations and production management roles.

Roy has been an active member of The Russell Society (https://russellsoc.org/), the leading organisation for topographical mineralogy in the UK, for more than forty years, serving as Journal Manager, Vice-President, President and most recently General Secretary.

In 1981 he founded the British Micromount Societyhttps://bms.mineralcollective.com/ and is the Society’s Honorary Life President. He was inducted into the Micromounters Hall of Fame in 2005 in recognition of his support for the micromounting hobby.

Roy enjoys researching and writing about mineralogy every bit a much as getting out in the field collecting. He has published widely on British topographical mineralogy, including papers in the Mineralogical Magazine, Scottish Journal of Geology, Proceedings of the Geologists’ Association, Proceedings of the Bristol Naturalists’ Society, the Journal of the Russell Society and The Mineralogical Record.

More recently Roy has self-published three bookshttps://britishmineralogy.com/wordpress/: Crystal Mountains – Minerals of the Cairngorms, Minerals of the English Midlands and most recently Making it Mine – Sir Arthur Russell and his Mineral Collection. He is keen to share his experiences and to encourage other members of the mineral collector community to consider writing up their favourite areas or subjects but sounds a note of caution – “You don’t do this to make money!” If all goes well, it should be possible to recoup the cost of producing the book.

In 2017 Roy was winner of the first Marsh Award for Mineralogyhttps://naturalhistorymuseum.blog/2017/02/21/roy-starkey-wins-first-marsh-award-for-mineralogy/, in recognition of his huge contribution to the field of mineralogy and is currently a Scientific Associate at the Natural History Museum, London.

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Cover of the book by Roy Starkey "Making it mine: Sir Arthur Russell and his Mineral Collection."

Photograph courtesy of Roy Starkey.


If you have missed a previous episode, they are posted 30 days after the event. Posted so far are:

Episode 01https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4f86ec0fff&e=7aa497567c - Eloïse Gaillou; Episode 02https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2a1d838c2d&e=7aa497567c - Robert Lavinsky; Episode 03https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=bb6a25bb4a&e=7aa497567c - Peter Megaw; Episode 04https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=562085063a&e=7aa497567c - Thomas Bellicam; Episode 05https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=62e68d29bf&e=7aa497567c - Dr. Raquel Alonso-Perez; Episode 06https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=88deed5379&e=7aa497567c - Diana and Ian Bruce; Episode 07https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ae2a8f2659&e=7aa497567c - Patrick Dreher; Episode 08https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7c91d242be&e=7aa497567c -  John Rakovan; Episode 09https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f5ee50482b&e=7aa497567c - Vera Hammer; Episode 10https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a01eb7696b&e=7aa497567c - Ryan Roney; Episode 11https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0adb764262&e=7aa497567c - Bill Larson; Episode 12https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=fcdd889c7c&e=7aa497567c - Joylan Ralph; Episode 13https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e40a3b6142&e=7aa497567c - Salim Eddé;  Episode 14https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=d6a6b7aa26&e=7aa497567c - George Rossman;  Episode 15https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=037c1b68ca&e=7aa497567c - The Collector's Edge; Episode 16https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2cf6ac48d9&e=7aa497567c - Daniel Trinchillo; Episode 17https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=44c1808336&e=7aa497567c - Jack Halpern; Episode 18https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f9b3bbd025&e=7aa497567c- Stefan Nicolescu; Episode 19https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=65d3059365&e=7aa497567c - Sami Makki, Matrix India;  Episode 20https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=928b8ea5a1&e=7aa497567c - Terry Wallace; Episode 21https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5aa0a5c3b7&e=7aa497567c - Tama Higuchi; Episode 22https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2ba0a17dcb&e=7aa497567c - Katherine Dunnell; Episode 23https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6417ec210b&e=7aa497567c - Emanuele Marini; Episode 24https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7541a25e75&e=7aa497567c - Gail and Jim Spann; Episode 25https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0f0cabe85d&e=7aa497567c - Gloria Staebler; Episode 26https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8f4b0f52cc&e=7aa497567c- Frank Keutsch; Episode 27https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=59a41038ee&e=7aa497567c- Tom and Christi, The Min Record; Episode 28https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=87b63beb6e&e=7aa497567c - Fabian Wildfang; Episode 29https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=aa79f8c9d1&e=7aa497567c - Jordi Fabre; Episode 30https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8bb11167af&e=7aa497567c - Bryan Swoboda; Episode 31https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=51c09777d4&e=7aa497567c - Gene Meieran; Episode 32https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=58c908e400&e=7aa497567c - Jeff Scovil; Episode 33https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1b427f9c59&e=7aa497567c- Federico Pezzotta; Episode 34https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=70a58d335b&e=7aa497567c- Paula Crevoshay; Episode 35https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e5c1516376&e=7aa497567c- Joe Dorris; yout- Episode 36https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7e63b28226&e=7aa497567c- Stuart Wilensky; Episode 37https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5ad28de30d&e=7aa497567c- Bruce Cairncross; Episode 38https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1995b72690&e=7aa497567c- Alex Schauss; Episode 39https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=be00910d79&e=7aa497567c- Andreas Stucki; Episode https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3bc662da40&e=7aa497567c 40https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4acda18d85&e=7aa497567c- Kimberly Vagner; Episode 41https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0e4c95f384&e=7aa497567c- Alan Hart; Episode 42https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=acfbc4bb96&e=7aa497567c- Elizabeth Rampe; Episode 43https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=fb16565869&e=7aa497567c-  Alex Speer; Episode 44https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2730aa3a51&e=7aa497567c-  Shelly Sergent; Episode 45https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9fd8240aa9&e=7aa497567c- Edward Boehm; Episode 46https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e35dfa07ce&e=7aa497567c: Barbara Barrett/Carl Francis; Episode 47https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e3ac4694fe&e=7aa497567c: Nicolai Medvedev; Episode 48https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6f63a08580&e=7aa497567c: Rui Gallopim; Episode 49https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=847640ae11&e=7aa497567c: Robert Hazen; Episode 50https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=36ad9f0a99&e=7aa497567c: Wayne & Dona Leicht; Episode 51https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6ef389b3e5&e=7aa497567c: George Harlow; Episode 52https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0eaa00d38a&e=7aa497567c: Aaron Palke; Episode 53https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=20ca52e0bf&e=7aa497567c: Doug and Rich Graeme; Episode 54https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3dcb31f2b6&e=7aa497567c: Laszlo Kupi; Episode 55https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e9eb5b12d6&e=7aa497567c: Virgil Lueth; Episode 56https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1a95908494&e=7aa497567c: Jean-Claude Boulliard; Episode 57https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6ced50dfcd&e=7aa497567c: Eric Fritz; Episode 58https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8e54a1dd63&e=7aa497567c: Bob Jackson ; Episode 59https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=21662367d7&e=7aa497567c: Naomi Sarna; Episode 60https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=fed1bc6d3c&e=7aa497567c: Bob Downs; Episode 61https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=edf1acb550&e=7aa497567c: Malcom Southwood; ; Episode 62https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=bdf5aa7f75&e=7aa497567c: Federico Barlocher

Mineral Talks LIVE - Brought to you by Bryan Swoboda of BlueCap Productions, Dr. Raquel Alonso-Perez of The Mineralogical and Geological Museum at Harvard Universityhttps://mgmh.fas.harvard.edu/ (MGMH), Dr. Eloïse Gaillou of the Musée de Minéralogie, l’École des Mines de Parishttps://www.musee.minesparis.psl.eu/Home/ and The Society of Mineral Museums Professionalshttp://www.smmp.net/ (SMMP).

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Copyright © 2022 MineralTalksLIVE, All rights reserved.

Our mailing address is: info@mineraltalkslive.comhttp://info@mineraltalkslive.com/

[cid:image001.jpg@01D8A34A.F7ED48A0] August 3 Webinar Every first Wednesday of every month is Mineral Talks LIVE - the monthly LIVE interview series where we sit down the most fascinating people in the mineral world from all over the world and talk rocks. Collectors, Curators, Curatrixes, Artists, Researchers, Publishers, Dealers and more. We get into their origin stories and get updated on some of the things they're working on now. It's always fun, often educational and one of the best ways to learn more about the people who make the mineral world what it is. You are invited to the next Mineral Talks Live webinar: 3 August 2022 1:00 PM Eastern Time (US and Canada) Register in advance for this webinar: http://go.mineraltalkslive.com/register After registering, you will receive a confirmation email containing information about joining the webinar. Webinar Speaker: Roy Starkey [cid:image002.jpg@01D8A34D.56426230] Roy Starkey became interested in minerals at an early age but growing up in the South of England (Cretaceous chalk) provided few opportunities to go field collecting. Later he was able to direct family holidays to areas of potential mineral interest – North Wales, the Lake District and Scotland. His brother and parents would all join in the hunt and pile up likely specimens for Roy to vet. At secondary school he was fascinated by anything to do with science (especially chemistry) and was an avid follower of the Apollo space missions. He went on to study geology at the University of Sheffield and subsequently followed a career in manufacturing industry in various operations and production management roles. Roy has been an active member of The Russell Society (https://russellsoc.org/), the leading organisation for topographical mineralogy in the UK, for more than forty years, serving as Journal Manager, Vice-President, President and most recently General Secretary. In 1981 he founded the British Micromount Society<https://bms.mineralcollective.com/> and is the Society’s Honorary Life President. He was inducted into the Micromounters Hall of Fame in 2005 in recognition of his support for the micromounting hobby. Roy enjoys researching and writing about mineralogy every bit a much as getting out in the field collecting. He has published widely on British topographical mineralogy, including papers in the Mineralogical Magazine, Scottish Journal of Geology, Proceedings of the Geologists’ Association, Proceedings of the Bristol Naturalists’ Society, the Journal of the Russell Society and The Mineralogical Record. More recently Roy has self-published three books<https://britishmineralogy.com/wordpress/>: Crystal Mountains – Minerals of the Cairngorms, Minerals of the English Midlands and most recently Making it Mine – Sir Arthur Russell and his Mineral Collection. He is keen to share his experiences and to encourage other members of the mineral collector community to consider writing up their favourite areas or subjects but sounds a note of caution – “You don’t do this to make money!” If all goes well, it should be possible to recoup the cost of producing the book. In 2017 Roy was winner of the first Marsh Award for Mineralogy<https://naturalhistorymuseum.blog/2017/02/21/roy-starkey-wins-first-marsh-award-for-mineralogy/>, in recognition of his huge contribution to the field of mineralogy and is currently a Scientific Associate at the Natural History Museum, London. [A picture containing timeline Description automatically generated] Cover of the book by Roy Starkey "Making it mine: Sir Arthur Russell and his Mineral Collection." Photograph courtesy of Roy Starkey. *************** If you have missed a previous episode, they are posted 30 days after the event. Posted so far are: Episode 01<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4f86ec0fff&e=7aa497567c> - Eloïse Gaillou; Episode 02<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2a1d838c2d&e=7aa497567c> - Robert Lavinsky; Episode 03<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=bb6a25bb4a&e=7aa497567c> - Peter Megaw; Episode 04<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=562085063a&e=7aa497567c> - Thomas Bellicam; Episode 05<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=62e68d29bf&e=7aa497567c> - Dr. Raquel Alonso-Perez; Episode 06<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=88deed5379&e=7aa497567c> - Diana and Ian Bruce; Episode 07<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=ae2a8f2659&e=7aa497567c> - Patrick Dreher; Episode 08<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7c91d242be&e=7aa497567c> - John Rakovan; Episode 09<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f5ee50482b&e=7aa497567c> - Vera Hammer; Episode 10<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=a01eb7696b&e=7aa497567c> - Ryan Roney; Episode 11<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0adb764262&e=7aa497567c> - Bill Larson; Episode 12<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=fcdd889c7c&e=7aa497567c> - Joylan Ralph; Episode 13<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e40a3b6142&e=7aa497567c> - Salim Eddé; Episode 14<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=d6a6b7aa26&e=7aa497567c> - George Rossman; Episode 15<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=037c1b68ca&e=7aa497567c> - The Collector's Edge; Episode 16<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2cf6ac48d9&e=7aa497567c> - Daniel Trinchillo; Episode 17<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=44c1808336&e=7aa497567c> - Jack Halpern; Episode 18<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=f9b3bbd025&e=7aa497567c>- Stefan Nicolescu; Episode 19<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=65d3059365&e=7aa497567c> - Sami Makki, Matrix India; Episode 20<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=928b8ea5a1&e=7aa497567c> - Terry Wallace; Episode 21<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5aa0a5c3b7&e=7aa497567c> - Tama Higuchi; Episode 22<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2ba0a17dcb&e=7aa497567c> - Katherine Dunnell; Episode 23<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6417ec210b&e=7aa497567c> - Emanuele Marini; Episode 24<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7541a25e75&e=7aa497567c> - Gail and Jim Spann; Episode 25<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0f0cabe85d&e=7aa497567c> - Gloria Staebler; Episode 26<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8f4b0f52cc&e=7aa497567c>- Frank Keutsch; Episode 27<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=59a41038ee&e=7aa497567c>- Tom and Christi, The Min Record; Episode 28<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=87b63beb6e&e=7aa497567c> - Fabian Wildfang; Episode 29<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=aa79f8c9d1&e=7aa497567c> - Jordi Fabre; Episode 30<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8bb11167af&e=7aa497567c> - Bryan Swoboda; Episode 31<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=51c09777d4&e=7aa497567c> - Gene Meieran; Episode 32<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=58c908e400&e=7aa497567c> - Jeff Scovil; Episode 33<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1b427f9c59&e=7aa497567c>- Federico Pezzotta; Episode 34<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=70a58d335b&e=7aa497567c>- Paula Crevoshay; Episode 35<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e5c1516376&e=7aa497567c>- Joe Dorris; yout- Episode 36<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=7e63b28226&e=7aa497567c>- Stuart Wilensky; Episode 37<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=5ad28de30d&e=7aa497567c>- Bruce Cairncross; Episode 38<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1995b72690&e=7aa497567c>- Alex Schauss; Episode 39<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=be00910d79&e=7aa497567c>- Andreas Stucki; Episode <https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3bc662da40&e=7aa497567c> 40<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=4acda18d85&e=7aa497567c>- Kimberly Vagner; Episode 41<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0e4c95f384&e=7aa497567c>- Alan Hart; Episode 42<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=acfbc4bb96&e=7aa497567c>- Elizabeth Rampe; Episode 43<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=fb16565869&e=7aa497567c>- Alex Speer; Episode 44<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=2730aa3a51&e=7aa497567c>- Shelly Sergent; Episode 45<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=9fd8240aa9&e=7aa497567c>- Edward Boehm; Episode 46<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e35dfa07ce&e=7aa497567c>: Barbara Barrett/Carl Francis; Episode 47<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e3ac4694fe&e=7aa497567c>: Nicolai Medvedev; Episode 48<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6f63a08580&e=7aa497567c>: Rui Gallopim; Episode 49<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=847640ae11&e=7aa497567c>: Robert Hazen; Episode 50<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=36ad9f0a99&e=7aa497567c>: Wayne & Dona Leicht; Episode 51<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6ef389b3e5&e=7aa497567c>: George Harlow; Episode 52<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=0eaa00d38a&e=7aa497567c>: Aaron Palke; Episode 53<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=20ca52e0bf&e=7aa497567c>: Doug and Rich Graeme; Episode 54<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=3dcb31f2b6&e=7aa497567c>: Laszlo Kupi; Episode 55<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=e9eb5b12d6&e=7aa497567c>: Virgil Lueth; Episode 56<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=1a95908494&e=7aa497567c>: Jean-Claude Boulliard; Episode 57<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=6ced50dfcd&e=7aa497567c>: Eric Fritz; Episode 58<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=8e54a1dd63&e=7aa497567c>: Bob Jackson ; Episode 59<https://mineraltalkslive.us10.list-manage.com/track/click?u=29de2322958cd757b7752b3ec&id=21662367d7&e=7aa497567c>: Naomi Sarna; 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[cid:image004.jpg@01D8A34A.F7ED48A0] Copyright © 2022 MineralTalksLIVE, All rights reserved. Our mailing address is: info@mineraltalkslive.com<http://info@mineraltalkslive.com/>
RR
Rachel Russell
Mon, Aug 1, 2022 2:31 PM

Dear American Mineralogist Readers,

Below are the Paper Highlights for this month’s issue of the American Mineralogist: International Journal of Earth and Planetary Materials. You may also view the American Mineralogist Paper Highlights list at here (http://www.minsocam.org/MSA/Ammin/AM_NotableArticles.html).

The DOI links below will take you to the abstract on GeoScienceWorld.

If you have “IP” access via your institution’s library, it should reveal the whole paper. Consult your institution’s IT department or friendly librarian.

If you have MSA membership, then authenticate in from the American Mineralogist menu (herehttp://www.msapubs.org/ directly). Once at the portal page, click the right-side American Mineralogist link, enter your user name (e-mail address), and your password (membership number). Then search via your browser’s search tools for the paper you want to read. (On Rachel’s computer, it is control-f but we think that is little different for everyone.)

Note that on GSW you can sign up for a table of contents to be sent you when the issue is live -- this is a feature open to anyone who registers on the site.
Thank you for reading American Mineralogist.

Sincerely,
Hongwu Xu
Don Baker

Estimating kaolinite crystallinity using near-infrared spectroscopy: Implications for its geology on Earth and Mars
https://doi.org/10.2138/am-2022-8025
Pineau et al. investigated the near-infrared (NIR) spectral signatures of kaolinite to see if they can be used as a proxy of kaolinite crystallinity. The authors acquired NIR reflectance spectra of terrestrial kaolinites with well-constrained geological origins and estimated their crystallinity using XRD. They then studied the NIR signature of kaolinite by using specific spectral criteria developed using the second and third derivative NIR spectra. They compared the spectral criteria values with the XRD indices and observed high correlations between these, showing that NIR signature of kaolinite can be used as a semi-quantitative proxy to estimate its crystallinity. The authors also show that the crystallinity of kaolinite can be used as a proxy to determine its geological origin: (1) well-ordered kaolinites are not restricted to hydrothermal deposits; (2) kaolinites from a similar sedimentary or pedogenetic context can have contrasting crystallinities; (3) poorly crystalline kaolinites are more likely to have a sedimentary or pedogenetic origin. This study provides a methodology to quickly estimate the crystallinity of a kaolinite sample using NIR data, which gives important information about its geology. This work has implications in diverse domains, from industrial exploitation of kaolin to planetary exploration.

The interplay between twinning and cation inversion in MgAl2O4-spinel: Implications for a nebular thermochronometer
https://doi.org/10.2138/am-2021-7874
Manga et al. conducted a density-functional-theory study of the thermodynamics of spinel twins. They report a stable-cation inversion associated with the planar fault. The predicted cation-inversion near the twin is in stark contrast to the inversion that is known for the bulk spinel and has implications for different fields ranging from materials science to earth and planetary sciences. To the field of cosmochemistry, the study reports a nebular thermochronometer based on the predicted twin-induced cation-inversion.

The effect of fluorine on reaction rim growth dynamics in the ternary CaO-MgO-SiO2 system
https://doi.org/10.2138/am-2022-8123CCBY
Reaction rims are a border of secondary minerals formed at the margin of a primary grain in metamorphic rocks. Several features of reaction rims, such as the layer (phase) sequence, the relative layer thickness, and the internal microstructure, contain valuable information about the respective rim formation conditions, which all may be affected by the presence of volatile components. These features of reaction rims may, therefore, not only be used to reconstruct the P-T-t history of a metamorphic rock but also can tell something about the fluid composition in fluid-mediated metasomatic reactions. Frank and Joachim-Mrosko investigated the effect of fluorine on the growth dynamics and microstructure of reaction rims. Results show that natural reaction rims may have the potential to serve as "geofluidometers", which would be of great importance for samples that have lost all direct clues, such as fluid inclusions that usually allow us to unravel the chemical composition of metasomatic fluids.

Seeing through metamorphic overprints in Archean granulites: Combined high-resolution thermometry and phase-equilibrium modeling of the Lewisian Complex, Scotland
https://doi.org/10.2138/am-2022-8214CCBY
The Lewisian Complex in NW Scotland presents a record of the transition from the Neo-Archean to the Paleoproterozoic. However, this record is complicated by a long and varied history after peak metamorphism that has erased and/or partially reset much of the early history of the rocks. Such overprinting is a common feature of Archean granulites, and it poses a substantial problem when trying to understand the tectonic processes that were active prior to the onset of modern plate tectonics. By combining careful petrography with phase diagram modeling and a range of exchange thermometers, Gopon et al. obtained the peak and retrograde temperature history of the Lewisian Complex from a single, well preserved, representative sample of garnet-bearing mafic granulite. They present the application of high-resolution electron probe microanalysis (HR-EPMA) to sub-micrometer orthopyroxene exsolution lamellae in clinopyroxene. They discuss ways to mitigate issues associated with HR-EPMA including surface contamination, beam drift, standards, and the need to correct for secondary fluorescence effects. The resulting compositions from HR-EPMA analyses provide an independent measure of the retrograde temperature conditions and can also be used to back-calculate the compositions of clinopyroxene in the peak assemblage. They obtain peak metamorphic conditions for the Lewisian of > 11 kbar and >1025 °C and constrain subsequent metamorphic overprints to 850 °C (Grt-Cpx), 590 °C (Opx-Cpx), and 460 °C (Mag-Ilm).

Interphase misorientation as a tool to study metamorphic reactions and crystallization in geological materials
https://doi.org/10.2138/am-2021-7902
Morales presents a new method for the study of orientation relationships in minerals based on interphase misorientation angle/axes, which can be calculated from crystallographic orientation data acquired using electron backscatter diffraction. The results using this methodology have been obtained for several examples, including clacite-aragonite, olivine-antigorite, magnetite-hematite, plagioiclase-olivine, and plagioclase-ilmenite.

Trace-element partitioning between olivine and melt in lunar basalts
https://doi.org/10.2138/am-2022-7971
Chen et al. found that the partition coefficients for most elements between olivine and melt in lunar basalts (LB) fall within the range in terrestrial basalts (TB), except for three elements, Li, V, and Cr. Li partition coefficient (DLi) in LB is higher than in TB due to compositional differences between LB and TB. DV in LB is higher than in TB due to fO2 difference. DCr in LB is lower than in TB due to a combination of fO2 and compositional difference. Even though Cr is compatible and V is fairly incompatible during TB evolution, Cr is an incompatible element in primitive LB, with a similar degree of incompatibility as V, leading to nearly constant V/Cr ratio of 0.039 in lunar basalts.

Solving the iron quantification problem in low-kV EPMA: An essential step toward improved analytical spatial resolution in electron probe microanalysis-Fe-sulfides
https://doi.org/10.2138/am-2022-8027
In electron probe microanalysis (EPMA), the decrease of the electron beam size permitted by Schottky field emission sources combined with the reduction of the electron interaction volume obtained by decreasing the accelerating voltage from traditional 15-20 kV to 7 kV, may allow for accurately quantifying submicrometer-sized features. Moy et al. describe two low accelerating voltage EPMA techniques to quantify Fe. The first method uses the low-intensity Fe Ll X-ray line, while the second method uses the area of the combined Fe Lalpha-Lbeta X-ray lines. The second method is based on a calibration curve that can be applied to any electron microprobe, for measurements performed at 7 kV with 40 ° takeoff angle spectrometers, without having to recalibrate. The calibration curve is used to convert experimental Fe Lalpha-Lbeta area k-ratios, calculated with a pure metallic Fe standard, into Fe concentrations. Both methods have been successfully applied to the quantification of Fe-sulfide specimens, producing substantial improvements compared to the traditional EPMA quantification method, which uses the Fe Lbeta X-ray line.

Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: A complex intraplate alkaline volcano
https://doi.org/10.2138/am-2021-7861
Scarrow et al. studied the Oki-Dozen ocean island complex intraplate alkaline volcano, Sea of Japan, which preserves temporally associated evolved intrusions, dikes, and lavas, revealing magma storage architecture and processes. SHRIMP U-Th-Pb zircon ages, 6.4 to 5.7 Ma, combined with compositional data, show the pluton formed by low flux protracted amalgamation of discrete magma pulses. The rhyolite dike preserves an evolved segregate of these, whereas the trachyte magma, derived from the same source, stalled at relatively shallow depths prior to eruption.

Using cathodoluminescence to identify oscillatory zoning of perthitic K-feldspar from the equigranular Toki granite
https://doi.org/10.2138/am-2022-8146
Yuguchi et al. report on novel use of cathodoluminescence (CL) in observing oscillatory zoning in perthitic K-feldspars from the equigranular Toki granite, central Japan. Based on the CL patterns, two types of zoning were identified: single core oscillatory zoning (SCOZ) and multiple core oscillatory zoning (MCOZ). This study demonstrates that CL patterns can reveal crystal growth behavior and nucleation of magmatic K-feldspar, which are useful for revealing the spatial extent of element partitioning between the melt and crystal and that of mass transfer from the melt into the crystal during the evolution of magma chamber processes.

Influence of intensive parameters and assemblies on friction evolution during piston-cylinder experiments
https://doi.org/10.2138/am-2022-7958
Piston-cylinder presses are used worldwide to mimic the pressure and temperature conditions in the planetary interiors up to ~5 GPa. However, the accuracy of targeted pressure during an experiment is highly debated because piston-cylinder assemblies exhibit inhomogeneous pressure distributions and biases compared to the theoretical pressure applied to the hydraulic press. Condamine et al. conducted almost 40 experiments to provide an overview of the cell performance for the most common pressure media and their applicability for Earth science experiments.

Formation process of Al-rich calcium amphibole in quartz-bearing eclogites from the Sulu belt, China
https://doi.org/10.2138/am-2022-7996
Enami et al. studied the Al-rich and Si-poor amphibole in quartz-bearing (Si-saturated) eclogites from the Sulu ultrahigh-pressure (UHP) metamorphic belt by electron probe micro analyzer (EPMA), focused ion beam system (FIB)-transmission electron microscope (TEM), and electron backscattered diffraction (EBSD) method, and discussed why the Al-rich and Si-poor amphibole formed in quartz-bearing (Si-saturated) rocks. This amphibole occurs around garnet porphyroblast, and these two phases have characteristically very similar molecular Al/Si and Ca/Si values to each other. The Al-rich and Si-poor amphibole is a pseudomorph after garnet and formed by the preferential diffusions of Mg, Fe2+, and alkali elements between garnet and the matrix during exhumation and hydration stages of the Sulu eclogites. In contrast, Si, Al, and Ca, which have smaller diffusion coefficients, probably did not migrate much and contributed to the growth of the Al-rich and Si-poor amphibole with little change in their ratios from the garnet value. The formation process of the amphibole is discussed in relation to the very rapid exhumation rate of the Sulu UHP metamorphic belt, which has been proposed by many studies.

Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in SE Yunnan, SW China
https://doi.org/10.2138/am-2021-7919
Southeastern Yunnan is a major Sn polymetallic province of China, with the Dulong large Sn-Zn polymetallic deposit being one of the most representative deposits. Liu et al. investigated helvine-danalite mineralogy of the Dulong Sn-Zn deposit and showed that (1) helvine-group minerals at Dulong include oscillatory-zoned helvine-danalite; (2) oscillatory zoning mainly formed by fluctuations of the ore-fluid fS2 and fO2; (3) helvine zone likely formed under higher fS2 and lower fO2 than the danalite zone; and 4) cassiterite U-Pb dating yielded 86.5 ± 1.6 Ma, coeval with sulfide mineralization.

Native gold enrichment process during growth of chalcopyrite-lined conduits within a modern hydrothermal chimney (Manus Basin, PNG)
https://doi.org/10.2138/am-2021-7866
Seafloor hydrothermal chimneys from back-arc basins are important hosts for metals, such as Cu, Zn, Pb, Ag, and Au, and detailed knowledge of mineralogy and chimney growth history will help understand the spatial distribution and enrichment mechanism of precious metals. To unravel the mechanism of native gold precipitation during the growth of multiple chalcopyrite-lined conduits as part of a modern chalcopyrite-sphalerite chimney, Hu et al. conducted a submicrometer- to a millimeter-scale investigation of the mineralogy and microstructures with a combination of SEM-EBSD and Synchrotron XRF. Gold occurrence in chalcopyrite-lined conduit walls is relatively rare and often associated with tennantite or Bi-tellurite. This study showed that gold is closely associated with various sulfides, including chalcopyrite, sphalerite, tennantite, and pyrite, and may precipitate during different mixing processes between hydrothermal fluids and surrounding fluids. The observed board spectrum of gold-sulfide associations in chalcopyrite-lined chimney walls provides important implications for searching for native gold in more modern seafloor hydrothermal chimneys, as well as in ancient volcanogenic massive sulfide deposits.

Pliniusite, Ca5(VO4)3F, a new apatite-group mineral and the novel natural ternary solid-solution system pliniusite-svabite-fluorapatite
https://doi.org/10.2138/am-2022-8100
Pekov et al. report the discovery of a new apatite-group mineral, pliniusite, ideally Ca5(VO4)3F, the second vanadate mineral of the apatite supergroup, in fumarole exhalations at the Tolbachik volcano (Kamchatka, Russia) and in a pyrometamorphic rock of the Hatrurim Complex (Israel). Pliniusite, fluorapatite Ca5(PO4)3F, and svabite Ca5(AsO4)3F form an almost continuous ternary solid-solution system with wide variations of T5+ = P, As, and V. The combination of high temperature, low pressure, and high oxidizing potential is favorable for the incorporation of V5+ into calcium apatite-type compounds and in general for the formation of fluorovanadates.

Heamanite-(Ce), (K0.5Ce0.5)TiO3, a new perovskite supergroup mineral found in diamond from Gahcho Kue, Canada
https://doi.org/10.2138/am-2022-8098
Anzolini et al. report the discovery and description of a new perovskite-group mineral, heamanite-(Ce), ideally (K0.5Ce0.5)TiO3, found as an inclusion in a diamond from the Gahcho Kue mine in the Northwest Territories, Canada. Heamanite-(Ce) is the K-analog of loparite-(Ce), ideally (NaCe)Ti2O6. This finding not only represents the sixth perovskite-structured mineral to occur in Earth's mantle, along with perovskite sensu stricto, K-REE- Cr-rich tausonite, bridgmanite, CaSiO3-perovskite, and goldschmidtite, but also indicates that perovskite-structured oxides have the potential to be significant hosts for K and LREE in the mantle. To precipitate a phase with such high concentrations of incompatible elements, we suggest that extreme levels of fractionation occurred in the fractionating metasomatic fluid. Moreover, the high concentration of radiogenic elements in heamanite-(Ce) may allow for future isotopic dating, making this discovery of interest to geochemists, kimberlite petrologists, and mineralogists.

A revised analysis of ferrihydrite at liquid helium temperature using Mossbauer spectroscopy
https://doi.org/10.2138/am-2021-7802
Ferrihydrite is ubiquitous in the environment and is a major component of the bioavailable global iron pool. A powerful analytical approach for studying ferrihydrite is 57Fe Moessbauer spectroscopy. However, despite the first spectrum being published several decades ago, there remain conflicting and contradicting reports in the literature on the best way to fit it. Byrne and Kappler have rigorously fitted 2-line and 6-line ferrihydrite using a range of models and multiple sites to determine the most statistically relevant approach to interpreting this enigmatic mineral.

First find of merrillite Ca3(PO4)2 in a terrestrial environment as an inclusion in lower-mantle diamond
https://doi.org/10.2138/am-2022-8175
Kaminsky and Zedgenizov found merrillite as inclusions in lower-mantle diamonds from the Juina area in Brazil. Previously this rare mineral was known only in meteorites and Lunar rocks. This finding may be of importance because merrillite and tuite are considered members of the deep Earth minerals and potential hosts for rare earth elements and large ion lithophile elements.

Book Review: Deep Carbon: Past to Present
https://doi.org/10.2138/am-2022-B107814

New Mineral Names: Hydrous Minerals
https://doi.org/10.2138/am-2022-NMN107813

Dear American Mineralogist Readers, Below are the Paper Highlights for this month’s issue of the American Mineralogist: International Journal of Earth and Planetary Materials. You may also view the American Mineralogist Paper Highlights list at here (http://www.minsocam.org/MSA/Ammin/AM_NotableArticles.html). The DOI links below will take you to the abstract on GeoScienceWorld. If you have “IP” access via your institution’s library, it should reveal the whole paper. Consult your institution’s IT department or friendly librarian. If you have MSA membership, then authenticate in from the American Mineralogist menu (here<http://www.msapubs.org/> directly). Once at the portal page, click the right-side American Mineralogist link, enter your user name (e-mail address), and your password (membership number). Then search via your browser’s search tools for the paper you want to read. (On Rachel’s computer, it is control-f but we think that is little different for everyone.) Note that on GSW you can sign up for a table of contents to be sent you when the issue is live -- this is a feature open to anyone who registers on the site. Thank you for reading American Mineralogist. Sincerely, Hongwu Xu Don Baker Estimating kaolinite crystallinity using near-infrared spectroscopy: Implications for its geology on Earth and Mars https://doi.org/10.2138/am-2022-8025 Pineau et al. investigated the near-infrared (NIR) spectral signatures of kaolinite to see if they can be used as a proxy of kaolinite crystallinity. The authors acquired NIR reflectance spectra of terrestrial kaolinites with well-constrained geological origins and estimated their crystallinity using XRD. They then studied the NIR signature of kaolinite by using specific spectral criteria developed using the second and third derivative NIR spectra. They compared the spectral criteria values with the XRD indices and observed high correlations between these, showing that NIR signature of kaolinite can be used as a semi-quantitative proxy to estimate its crystallinity. The authors also show that the crystallinity of kaolinite can be used as a proxy to determine its geological origin: (1) well-ordered kaolinites are not restricted to hydrothermal deposits; (2) kaolinites from a similar sedimentary or pedogenetic context can have contrasting crystallinities; (3) poorly crystalline kaolinites are more likely to have a sedimentary or pedogenetic origin. This study provides a methodology to quickly estimate the crystallinity of a kaolinite sample using NIR data, which gives important information about its geology. This work has implications in diverse domains, from industrial exploitation of kaolin to planetary exploration. The interplay between twinning and cation inversion in MgAl2O4-spinel: Implications for a nebular thermochronometer https://doi.org/10.2138/am-2021-7874 Manga et al. conducted a density-functional-theory study of the thermodynamics of spinel twins. They report a stable-cation inversion associated with the planar fault. The predicted cation-inversion near the twin is in stark contrast to the inversion that is known for the bulk spinel and has implications for different fields ranging from materials science to earth and planetary sciences. To the field of cosmochemistry, the study reports a nebular thermochronometer based on the predicted twin-induced cation-inversion. The effect of fluorine on reaction rim growth dynamics in the ternary CaO-MgO-SiO2 system https://doi.org/10.2138/am-2022-8123CCBY Reaction rims are a border of secondary minerals formed at the margin of a primary grain in metamorphic rocks. Several features of reaction rims, such as the layer (phase) sequence, the relative layer thickness, and the internal microstructure, contain valuable information about the respective rim formation conditions, which all may be affected by the presence of volatile components. These features of reaction rims may, therefore, not only be used to reconstruct the P-T-t history of a metamorphic rock but also can tell something about the fluid composition in fluid-mediated metasomatic reactions. Frank and Joachim-Mrosko investigated the effect of fluorine on the growth dynamics and microstructure of reaction rims. Results show that natural reaction rims may have the potential to serve as "geofluidometers", which would be of great importance for samples that have lost all direct clues, such as fluid inclusions that usually allow us to unravel the chemical composition of metasomatic fluids. Seeing through metamorphic overprints in Archean granulites: Combined high-resolution thermometry and phase-equilibrium modeling of the Lewisian Complex, Scotland https://doi.org/10.2138/am-2022-8214CCBY The Lewisian Complex in NW Scotland presents a record of the transition from the Neo-Archean to the Paleoproterozoic. However, this record is complicated by a long and varied history after peak metamorphism that has erased and/or partially reset much of the early history of the rocks. Such overprinting is a common feature of Archean granulites, and it poses a substantial problem when trying to understand the tectonic processes that were active prior to the onset of modern plate tectonics. By combining careful petrography with phase diagram modeling and a range of exchange thermometers, Gopon et al. obtained the peak and retrograde temperature history of the Lewisian Complex from a single, well preserved, representative sample of garnet-bearing mafic granulite. They present the application of high-resolution electron probe microanalysis (HR-EPMA) to sub-micrometer orthopyroxene exsolution lamellae in clinopyroxene. They discuss ways to mitigate issues associated with HR-EPMA including surface contamination, beam drift, standards, and the need to correct for secondary fluorescence effects. The resulting compositions from HR-EPMA analyses provide an independent measure of the retrograde temperature conditions and can also be used to back-calculate the compositions of clinopyroxene in the peak assemblage. They obtain peak metamorphic conditions for the Lewisian of > 11 kbar and >1025 °C and constrain subsequent metamorphic overprints to 850 °C (Grt-Cpx), 590 °C (Opx-Cpx), and 460 °C (Mag-Ilm). Interphase misorientation as a tool to study metamorphic reactions and crystallization in geological materials https://doi.org/10.2138/am-2021-7902 Morales presents a new method for the study of orientation relationships in minerals based on interphase misorientation angle/axes, which can be calculated from crystallographic orientation data acquired using electron backscatter diffraction. The results using this methodology have been obtained for several examples, including clacite-aragonite, olivine-antigorite, magnetite-hematite, plagioiclase-olivine, and plagioclase-ilmenite. Trace-element partitioning between olivine and melt in lunar basalts https://doi.org/10.2138/am-2022-7971 Chen et al. found that the partition coefficients for most elements between olivine and melt in lunar basalts (LB) fall within the range in terrestrial basalts (TB), except for three elements, Li, V, and Cr. Li partition coefficient (DLi) in LB is higher than in TB due to compositional differences between LB and TB. DV in LB is higher than in TB due to fO2 difference. DCr in LB is lower than in TB due to a combination of fO2 and compositional difference. Even though Cr is compatible and V is fairly incompatible during TB evolution, Cr is an incompatible element in primitive LB, with a similar degree of incompatibility as V, leading to nearly constant V/Cr ratio of 0.039 in lunar basalts. Solving the iron quantification problem in low-kV EPMA: An essential step toward improved analytical spatial resolution in electron probe microanalysis-Fe-sulfides https://doi.org/10.2138/am-2022-8027 In electron probe microanalysis (EPMA), the decrease of the electron beam size permitted by Schottky field emission sources combined with the reduction of the electron interaction volume obtained by decreasing the accelerating voltage from traditional 15-20 kV to 7 kV, may allow for accurately quantifying submicrometer-sized features. Moy et al. describe two low accelerating voltage EPMA techniques to quantify Fe. The first method uses the low-intensity Fe Ll X-ray line, while the second method uses the area of the combined Fe Lalpha-Lbeta X-ray lines. The second method is based on a calibration curve that can be applied to any electron microprobe, for measurements performed at 7 kV with 40 ° takeoff angle spectrometers, without having to recalibrate. The calibration curve is used to convert experimental Fe Lalpha-Lbeta area k-ratios, calculated with a pure metallic Fe standard, into Fe concentrations. Both methods have been successfully applied to the quantification of Fe-sulfide specimens, producing substantial improvements compared to the traditional EPMA quantification method, which uses the Fe Lbeta X-ray line. Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: A complex intraplate alkaline volcano https://doi.org/10.2138/am-2021-7861 Scarrow et al. studied the Oki-Dozen ocean island complex intraplate alkaline volcano, Sea of Japan, which preserves temporally associated evolved intrusions, dikes, and lavas, revealing magma storage architecture and processes. SHRIMP U-Th-Pb zircon ages, 6.4 to 5.7 Ma, combined with compositional data, show the pluton formed by low flux protracted amalgamation of discrete magma pulses. The rhyolite dike preserves an evolved segregate of these, whereas the trachyte magma, derived from the same source, stalled at relatively shallow depths prior to eruption. Using cathodoluminescence to identify oscillatory zoning of perthitic K-feldspar from the equigranular Toki granite https://doi.org/10.2138/am-2022-8146 Yuguchi et al. report on novel use of cathodoluminescence (CL) in observing oscillatory zoning in perthitic K-feldspars from the equigranular Toki granite, central Japan. Based on the CL patterns, two types of zoning were identified: single core oscillatory zoning (SCOZ) and multiple core oscillatory zoning (MCOZ). This study demonstrates that CL patterns can reveal crystal growth behavior and nucleation of magmatic K-feldspar, which are useful for revealing the spatial extent of element partitioning between the melt and crystal and that of mass transfer from the melt into the crystal during the evolution of magma chamber processes. Influence of intensive parameters and assemblies on friction evolution during piston-cylinder experiments https://doi.org/10.2138/am-2022-7958 Piston-cylinder presses are used worldwide to mimic the pressure and temperature conditions in the planetary interiors up to ~5 GPa. However, the accuracy of targeted pressure during an experiment is highly debated because piston-cylinder assemblies exhibit inhomogeneous pressure distributions and biases compared to the theoretical pressure applied to the hydraulic press. Condamine et al. conducted almost 40 experiments to provide an overview of the cell performance for the most common pressure media and their applicability for Earth science experiments. Formation process of Al-rich calcium amphibole in quartz-bearing eclogites from the Sulu belt, China https://doi.org/10.2138/am-2022-7996 Enami et al. studied the Al-rich and Si-poor amphibole in quartz-bearing (Si-saturated) eclogites from the Sulu ultrahigh-pressure (UHP) metamorphic belt by electron probe micro analyzer (EPMA), focused ion beam system (FIB)-transmission electron microscope (TEM), and electron backscattered diffraction (EBSD) method, and discussed why the Al-rich and Si-poor amphibole formed in quartz-bearing (Si-saturated) rocks. This amphibole occurs around garnet porphyroblast, and these two phases have characteristically very similar molecular Al/Si and Ca/Si values to each other. The Al-rich and Si-poor amphibole is a pseudomorph after garnet and formed by the preferential diffusions of Mg, Fe2+, and alkali elements between garnet and the matrix during exhumation and hydration stages of the Sulu eclogites. In contrast, Si, Al, and Ca, which have smaller diffusion coefficients, probably did not migrate much and contributed to the growth of the Al-rich and Si-poor amphibole with little change in their ratios from the garnet value. The formation process of the amphibole is discussed in relation to the very rapid exhumation rate of the Sulu UHP metamorphic belt, which has been proposed by many studies. Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in SE Yunnan, SW China https://doi.org/10.2138/am-2021-7919 Southeastern Yunnan is a major Sn polymetallic province of China, with the Dulong large Sn-Zn polymetallic deposit being one of the most representative deposits. Liu et al. investigated helvine-danalite mineralogy of the Dulong Sn-Zn deposit and showed that (1) helvine-group minerals at Dulong include oscillatory-zoned helvine-danalite; (2) oscillatory zoning mainly formed by fluctuations of the ore-fluid fS2 and fO2; (3) helvine zone likely formed under higher fS2 and lower fO2 than the danalite zone; and 4) cassiterite U-Pb dating yielded 86.5 ± 1.6 Ma, coeval with sulfide mineralization. Native gold enrichment process during growth of chalcopyrite-lined conduits within a modern hydrothermal chimney (Manus Basin, PNG) https://doi.org/10.2138/am-2021-7866 Seafloor hydrothermal chimneys from back-arc basins are important hosts for metals, such as Cu, Zn, Pb, Ag, and Au, and detailed knowledge of mineralogy and chimney growth history will help understand the spatial distribution and enrichment mechanism of precious metals. To unravel the mechanism of native gold precipitation during the growth of multiple chalcopyrite-lined conduits as part of a modern chalcopyrite-sphalerite chimney, Hu et al. conducted a submicrometer- to a millimeter-scale investigation of the mineralogy and microstructures with a combination of SEM-EBSD and Synchrotron XRF. Gold occurrence in chalcopyrite-lined conduit walls is relatively rare and often associated with tennantite or Bi-tellurite. This study showed that gold is closely associated with various sulfides, including chalcopyrite, sphalerite, tennantite, and pyrite, and may precipitate during different mixing processes between hydrothermal fluids and surrounding fluids. The observed board spectrum of gold-sulfide associations in chalcopyrite-lined chimney walls provides important implications for searching for native gold in more modern seafloor hydrothermal chimneys, as well as in ancient volcanogenic massive sulfide deposits. Pliniusite, Ca5(VO4)3F, a new apatite-group mineral and the novel natural ternary solid-solution system pliniusite-svabite-fluorapatite https://doi.org/10.2138/am-2022-8100 Pekov et al. report the discovery of a new apatite-group mineral, pliniusite, ideally Ca5(VO4)3F, the second vanadate mineral of the apatite supergroup, in fumarole exhalations at the Tolbachik volcano (Kamchatka, Russia) and in a pyrometamorphic rock of the Hatrurim Complex (Israel). Pliniusite, fluorapatite Ca5(PO4)3F, and svabite Ca5(AsO4)3F form an almost continuous ternary solid-solution system with wide variations of T5+ = P, As, and V. The combination of high temperature, low pressure, and high oxidizing potential is favorable for the incorporation of V5+ into calcium apatite-type compounds and in general for the formation of fluorovanadates. Heamanite-(Ce), (K0.5Ce0.5)TiO3, a new perovskite supergroup mineral found in diamond from Gahcho Kue, Canada https://doi.org/10.2138/am-2022-8098 Anzolini et al. report the discovery and description of a new perovskite-group mineral, heamanite-(Ce), ideally (K0.5Ce0.5)TiO3, found as an inclusion in a diamond from the Gahcho Kue mine in the Northwest Territories, Canada. Heamanite-(Ce) is the K-analog of loparite-(Ce), ideally (NaCe)Ti2O6. This finding not only represents the sixth perovskite-structured mineral to occur in Earth's mantle, along with perovskite sensu stricto, K-REE- Cr-rich tausonite, bridgmanite, CaSiO3-perovskite, and goldschmidtite, but also indicates that perovskite-structured oxides have the potential to be significant hosts for K and LREE in the mantle. To precipitate a phase with such high concentrations of incompatible elements, we suggest that extreme levels of fractionation occurred in the fractionating metasomatic fluid. Moreover, the high concentration of radiogenic elements in heamanite-(Ce) may allow for future isotopic dating, making this discovery of interest to geochemists, kimberlite petrologists, and mineralogists. A revised analysis of ferrihydrite at liquid helium temperature using Mossbauer spectroscopy https://doi.org/10.2138/am-2021-7802 Ferrihydrite is ubiquitous in the environment and is a major component of the bioavailable global iron pool. A powerful analytical approach for studying ferrihydrite is 57Fe Moessbauer spectroscopy. However, despite the first spectrum being published several decades ago, there remain conflicting and contradicting reports in the literature on the best way to fit it. Byrne and Kappler have rigorously fitted 2-line and 6-line ferrihydrite using a range of models and multiple sites to determine the most statistically relevant approach to interpreting this enigmatic mineral. First find of merrillite Ca3(PO4)2 in a terrestrial environment as an inclusion in lower-mantle diamond https://doi.org/10.2138/am-2022-8175 Kaminsky and Zedgenizov found merrillite as inclusions in lower-mantle diamonds from the Juina area in Brazil. Previously this rare mineral was known only in meteorites and Lunar rocks. This finding may be of importance because merrillite and tuite are considered members of the deep Earth minerals and potential hosts for rare earth elements and large ion lithophile elements. Book Review: Deep Carbon: Past to Present https://doi.org/10.2138/am-2022-B107814 New Mineral Names: Hydrous Minerals https://doi.org/10.2138/am-2022-NMN107813